Theories of Dark Matter

Dark matter is invisible and barely interacts with anything else. Finding dark matter and proving it exists is a difficult task. There are a few theories about what dark matter is but no one has found a way to detect it. It could be that the universe is mostly invisible. Listen to hear more about dark matter and what it can tell us.

Related Current Events

Scientists have discovered evidence of gravitational waves, which show ripples in space and time. A new machine has made it possible for scientists to observe space in a whole new way. Recently, the machine picked up vibrations from the collision of two black holes. The discovery comes a few months after the very first detection of gravitational waves. With these tools, scientists can look at the universe in a new way. In this story you will hear the signal from the black holes converted from gravitational waves to soundwave.

Scientists recently announced a huge discovery—gravitational waves. The waves were detected when a collision of two black holes created ripples or waves, similar to ripples on a pond. These ripples were predicted by Albert Einstein a century ago as a part of his theory of relativity. Scientists have been working to detect these waves for decades and are excited about the information that can be learned from them. In this story you will hear what gravitational waves sound like and learn more about their discovery.

Our world is made of matter. Everything you see and feel is ordinary matter. Matter has a counterpart called antimatter. And true to science-fiction stereotype, if matter and antimatter meet, they destroy each other. Scientists are trying to find out why antimatter is so rare. One recent experiment took place inside a giant particle accelerator where scientists made small amounts of antimatter. After studying and measuring the forces of both antimatter and matter, they found that they behaved exactly the same. Listen to hear more about this discovery and why it matters.

Since the end of the space shuttle program and the beginning of independently funded space exploration, NASA hasn’t been launching many new spacecrafts. This is changing with a recent test flight for NASA’s new spacecraft Orion, which is designed to carry astronauts into deep space. Listen to this public radio story to learn more about Orion’s design and goals.

Language Challenge Level

These levels of listening complexity can help teachers choose stories for their students. The levels do not relate to the content of the story, but to the complexity of the vocabulary, sentence structure and language in the audio story.

NOTE: Listenwise stories are intended for students in grades 5-12 and for English learners with intermediate language skills or higher.

Low

These stories are easier to understand and are a good starting point for everyone.

Medium

These stories have an average language challenge for students and can be scaffolded for English learners.

High

These stories have challenging vocabulary and complex language structure.